JP6932678B2 - solenoid valve - Google Patents

Description

The present invention relates to a solenoid valve that controls a fluid flow by driving a valve body with an electromagnetic drive unit to open and close a valve port.

Conventionally, as a solenoid valve of this type, for example, there are those disclosed in JP-A-2002-213635 (Patent Document 1) and JP-A-2017-129171 (Patent Document 2). These conventional solenoid valves drive the valve body by an electromagnetic drive unit equipped with an attractor and a plunger to open and close the valve port between the primary side joint where the fluid flows in and the secondary side joint where the fluid flows out. It is configured as. The solenoid valve disclosed in FIG. 6 of Patent Document 1 is a "energized open specification" solenoid valve that is opened by energizing the electromagnetic drive unit. Further, the solenoid valve disclosed in FIG. 9 of Patent Document 2 is a "conducting closed specification" solenoid valve that is closed by energizing the electromagnetic driving unit. Further, although the above is a two-way solenoid valve, a three-way solenoid valve that switches two outlets with respect to one inlet is also known and well known.

Japanese Unexamined Patent Publication No. 2002-213635 Japanese Unexamined Patent Publication No. 2017-129171

As disclosed in FIG. 6 of Patent Document 1 and FIG. 9 of Patent Document 2, the conventional two-way solenoid valve has a significantly different structure between a solenoid valve having an energized open specification and an electromagnetic valve having an energized closed specification. As described above, when changing this specification, a large structural change is required, and a dedicated part or a dedicated manufacturing facility is required according to each specification, which causes a problem of cost increase. Further, when the specification is changed from a two-way solenoid valve to a three-way solenoid valve or the like, there is a similar problem.

An object of the present invention is to make it possible to configure parts and manufacturing equipment in common as much as possible with a two-way solenoid valve having both an energization open specification and an energization closed specification and a three-way solenoid valve. do.

The solenoid valve according to claim 1 is a solenoid valve including a valve housing in which a valve chamber for accommodating the valve body is formed and an electromagnetic drive unit for moving the valve body in the axial direction. A main body portion in which a valve chamber and a primary side port for introducing a fluid communicating with the valve chamber are formed, and a valve seat surface that is assembled to the main body portion and is parallel to the axis is arranged on the valve chamber side. It is composed of a valve seat member that opens a valve port from the valve seat surface to the valve chamber, and the valve body slides on the valve seat surface in the axial direction to obtain the valve body. A base portion of the valve seat member that is configured to open and close and is assembled to the main body portion is fitted into a valve seat fitting hole that is aligned with the base portion of the main body portion, and the base portion and the valve seat fitting are fitted. The hole has a detent structure that fixes the position of the base in the axial direction and regulates the rotation around the orthogonal axis orthogonal to the axis, and also opens the valve port on the valve seat surface. The portions are unevenly distributed in the axial direction with respect to the orthogonal axis.

The solenoid valve of claim 2 is the solenoid valve of claim 1, and the cross section parallel to the valve seat surface of the base has a shape in which the length from the orthogonal axis to the outer circumference is partially different. It is characterized by.

The solenoid valve according to claim 3 is the solenoid valve according to claim 2, and the base portion and the valve seat fitting hole have only one location even if the base portion is rotated with respect to the orthogonal axis. It is characterized in that it does not fit into the seat fitting hole.

The solenoid valve according to claim 4 is the solenoid valve according to claim 3, wherein the valve body opens the valve port at a position where the plunger is attracted to the attractor side by energization at the solenoid drive unit. It is characterized by.

The solenoid valve according to claim 5 is the solenoid valve according to claim 3, wherein the valve body closes the valve port at a position where the plunger is attracted to the attractor side by energization at the solenoid drive unit. It is characterized by.

The solenoid valve according to claim 6 is the solenoid valve according to claim 4 or 5, wherein a second port is formed on the valve seat member at a position symmetrical to the valve port with respect to the orthogonal axis. It is characterized by being.

The solenoid valve of claim 7 is the solenoid valve of claim 6, which is a joint member attached to the valve seat member and having a flow path communicating with the valve port and the second port, respectively. It is characterized by being prepared.

According to the solenoid valves of claims 1 to 7, the valve housing is configured to fit the valve seat member to the main body and has a detent structure for restricting the rotation of the valve seat member. The valve seat member can be fixed in an appropriate position with respect to the main body, and the opening of the valve port of the valve seat member is formed unevenly in the axial direction with respect to the orthogonal axis orthogonal to the axis on which the valve body moves. Has been done. Therefore, depending on the valve seat member with respect to the main body, the position of the opening of the valve port can be changed between the energized open specification and the energized closed specification simply by arranging the positions of the valve port openings at two different positions symmetrical with respect to the orthogonal axis by 180 °. In order to manufacture two types of solenoid valves, the main body of the valve housing and the solenoid drive can be shared. In addition, manufacturing equipment can be standardized except for outlet joints (pipes). Further, since the rotation prevention structure of the valve seat member can regulate the rotation of the valve seat member around the orthogonal axis, the valve port position of the valve seat member is stabilized and the valve leakage variation is reduced.

Further, according to the solenoid valve of claim 6, a multi-way valve can be formed only by providing a second port on the valve seat member.

It is a vertical sectional view at the time of de-energization of the solenoid valve of 1st Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a figure which shows the modification of 1st Embodiment. It is a vertical sectional view at the time of de-energization of the solenoid valve of the 2nd Embodiment of this invention. FIG. 4 is a cross-sectional view taken along the line AA of FIG. It is a figure which shows the modification of 2nd Embodiment. It is a vertical sectional view at the time of de-energization of the solenoid valve of the 3rd Embodiment of this invention. It is a vertical sectional view at the time of de-energization of the solenoid valve of 4th Embodiment of this invention. It is a figure which shows the Example of the joint member in the solenoid valve of 4th Embodiment.

Next, an embodiment of the solenoid valve of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the solenoid valve of the first embodiment when the solenoid valve is not energized (valve closed state), FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is sectional drawing of the corresponding modification of 1st Embodiment. The concept of "upper and lower" in the following description corresponds to upper and lower in the drawing. The solenoid valve of this embodiment includes a valve housing 1, an electromagnetic drive unit 2, a connecting unit 3, and a valve body 4.

The valve housing 1 is composed of a main body portion 1A and a valve seat member 1B, and a thin annular step portion 1a is formed on the upper end surface of the main body portion 1A on the electromagnetic drive portion 2 side. A vertically long cylindrical valve chamber 10 having an axis X as a center line is formed inward toward the lower part. The axis X is also the center line of the plunger case 21, which will be described later. Further, the main body portion 1A has a pipe portion 1A1 protruding downward, and the primary side port 11 into which the fluid is introduced is formed by communicating with the valve chamber 10 through the pipe portion 1A1. Further, a substantially cylindrical valve seat fitting hole 1b that opens into the valve chamber 10 is formed on the side portion of the valve chamber 10. The valve seat fitting hole 1b has a shape having a beam portion 1b1 facing a D-cut surface 1B1a, which will be described later, forming a plane orthogonal to the axis X on a part of the inner peripheral surface of the cylinder. Then, the valve seat member 1B is fitted in the valve seat fitting hole 1b.

The valve seat member 1B has a substantially cylindrical base portion 1B1 that matches the valve seat fitting hole 1b, a pipe portion 1B2 that protrudes from the base portion 1B1, and a flange portion 1B3 formed on the outer peripheral portion of the base portion 1B1. It is configured. The end surface of the base portion 1B1 on the valve chamber 10 side is a flat valve seat surface 12a on which the valve body 4 described later slides, and a valve port 12 through which fluid flows from the valve seat surface 12a into the pipe portion 1B2 is provided. It is formed. As a result, the valve seat surface 12a is arranged parallel to the axis X, and the valve port 12 opens into the valve chamber 10 at the valve seat surface 12a. Further, the base portion 1B1 of the valve seat member 1B is a columnar body in which a D-cut surface 1B1a which is a plane orthogonal to the axis X is formed on a part of the side surface of the cylinder, and the orthogonal axis L is set on the base portion 1B1. Has been done. The orthogonal axis L is an axis orthogonal to the axis X and is the central axis of the base portion 1B1. The valve port 12 (and the pipe portion 1B2) is formed unevenly distributed from the orthogonal axis L in the axis X direction (upward in this embodiment). That is, the openings in the valve seat surface 12a of the valve port 12 are formed unevenly distributed in the axis X direction with respect to the orthogonal axis L. The valve seat member 1B and the main body 1A are sealed by an O-ring 13 arranged inside the flange 1B3 and on the outer periphery of the base 1B1.

The electromagnetic drive unit 2 includes a plunger case 21 made of a non-magnetic material, an attractor 22 made of a magnetic material fixed to the lower end of the plunger case 21, and a plunger arranged in the plunger case 21 facing the attractor 22. A plunger spring 24 disposed between the suction element 22 and the plunger 23 is provided. Further, the fixing sleeve 25 fixed to the lower end of the aspirator 22, the electromagnetic coil 26 arranged on the outer circumference of the plunger case 21 and wound around the bobbin 26a, and the outer side containing the electromagnetic coil 26 and the bobbin 26a are included. It includes a box 27 and a joint iron 28 that secures a magnetic path from the lower part of the outer box 27 to the suction element 22. An O-ring 14 is housed in the step portion 1a on the electromagnetic drive unit 2 side of the main body 1A, and the O-ring 14 is sandwiched between the outer box 27 of the electromagnetic drive unit 2 and the main body 1A. , The space between the electromagnetic drive unit 2 and the main body 1A is airtightly sealed.

The plunger case 21 is formed in a bottomed tubular shape with an opening on the lower side, and defines a plunger chamber 20 inside. Further, the plunger case 21 is fixed to the suction child 22 by welding or the like so as to cover the suction child 22 by a part of the side surface thereof. The suction element 22 has a mortar-shaped suction surface 22a that opens toward the plunger 23 side, a spring accommodating hole 22b that accommodates the plunger spring 24, and an insertion hole 22c that penetrates the bottom of the spring accommodating hole 22b.

The plunger 23 is made of an appropriate magnetic material so as to be attracted by the suction element 22, and is housed in the plunger chamber 20. Further, the plunger 23 has a tapered portion 231 on the suction element 22 side. The plunger 23 is provided so as to be movable in the axis X direction so that its outer peripheral surface is in sliding contact with the inner peripheral surface of the plunger case 21. Further, the plunger 23 is formed with a vertical hole 23a communicating from the upper surface thereof to the end portion on the suction element 22 side and an insertion hole 23b for fixing the connecting rod 31 described later in the central portion.

The connecting portion 3 is composed of a connecting rod 31 whose upper end is connected to the plunger 23 and a valve holder portion 32 integrally formed at the lower end of the connecting rod to hold the valve body 4. The connecting rod 31 has a connecting shaft 31a connected to the plunger 23 at its upper end. The valve holder portion 32 is formed with a columnar valve body mounting hole 32a so as to face the valve seat surface 12a of the valve seat member 1B. Further, a communication hole 32c that opens on the valve spring accommodating hole 32b and the valve chamber 10 side is formed coaxially with the valve body mounting hole 32a. Further, the valve holder portion 32 has a substantially cylindrical shape and has a parallel D-cut surface 32d facing the valve seat surface 12a. The valve spring 41 is housed in the valve spring accommodating hole 32b, and the valve body 4 is mounted in the valve body mounting hole 32a so as to come into contact with the valve spring 41.

The connecting rod 31 of the connecting portion 3 is inserted into the insertion hole 22c of the suction element 22, and the coupling shaft 31a at the upper end is inserted into the insertion hole 23b of the plunger 23 to crimp the end portion of the coupling shaft 31a. The connecting rod 31 (connecting portion 3) is fixed to the plunger 23. A pressure equalizing path 31b composed of a vertical hole and a horizontal hole is formed in the connecting rod 31, and the space above and below the plunger 23 in the plunger chamber 20 is communicated with the pressure equalizing path 31b.

The valve body 4 has a substantially cylindrical shape and has a sealing surface 4a that slides on the valve seat surface 12a of the valve seat member 1B. The sealing surface 4a is a surface having a diameter larger than the inner diameter of the valve port 12. As a result, the valve body 4 can slide with respect to the valve seat surface 12a of the valve seat member 1B by moving the connecting portion 3 (plunger 23).

With the above configuration, when the electromagnetic coil 26 is not energized, that is, when the electromagnetic coil 26 is not energized as shown in FIG. 1, the plunger 23, the connecting portion 3 and the valve body 4 are urged upward by the spring force of the plunger spring 24. Then, the step portion 3a at the boundary between the valve holder portion 32 and the connecting rod 31 is stopped at a predetermined position in contact with the lower end of the suction element 22. Then, at this predetermined position, the valve body 4 closes the opening of the valve port 12 on the valve seat surface 12a, and the valve is in the closed state. On the other hand, when energized, that is, when the electromagnetic coil 26 is energized, an attractive force is generated between the attractor 22 and the plunger 23, the plunger 23, the connecting portion 3 and the valve body 4 are lowered, and the valve body 4 is energized. Opens the opening of the valve port 12 and opens the valve.

As described above, the solenoid valve of the first embodiment is a "energized open specification" solenoid valve that is opened by energization. The position of the valve body 4 in the valve closed state and the position of the valve body 4 in the valve open state are equidistant from the orthogonal axis L in the axis X direction, and the dimensions of each part are set accordingly. There is. In the valve open state, the fluid flowing in from the primary port 11 flows out from the valve chamber 10 to the valve port 12, but the fluid flow at that time is from the outer periphery of the valve holder portion 32 to the D-cut surface 33d and the valve seat surface. It flows out to the valve port 12 through the space with 12a.

Further, in the solenoid valve of the first embodiment, the valve seat member 1B is fitted into the valve seat fitting hole 1b formed in the main body portion 1A, so that the valve seat fitting hole 1b and the base portion 1B1 have a D-cut shape. It is possible to prevent the valve seat member 1B from rotating around the orthogonal axis L with respect to the main body portion 1A. That is, the base portion 1B1 and the valve seat fitting hole 1b have a detent structure that fixes the position of the base portion 1B1 in the axis X direction and regulates the rotation around the orthogonal axis L that is orthogonal to the axis X. As a result, the position of the valve port 12 unevenly distributed in the axis X direction, which is the moving direction of the valve body 4, can be appropriately set, and a "energized open specification" solenoid valve can be configured.

FIG. 3 is a diagram showing a modified example of the first embodiment. In the following modified examples and each embodiment, the same reference numerals as those in FIG. 1 are added to the elements similar to those in the first embodiment, and duplicate description will be omitted as appropriate. In the modified example 1 of FIG. 3A, a ridge 1b2 is formed in the valve seat fitting hole 1b, a groove 1B1b is formed in the base portion 1B1 of the valve seat member 1B, and the ridge 1b2 is fitted in the groove 1B1b. As a result, a detent structure that regulates the rotation of the base 1B1 around the orthogonal axis L is configured. In the second modification of FIG. 3B, the valve seat fitting hole 1b'and the base 1B1'are formed into a pentagonal tubular shape and a pentagonal columnar shape. It has a detent structure that regulates rotation around the orthogonal axis L.

The detent structure is such that the length from the center line (orthogonal axis L) of the cross section parallel to the valve seat surface of the base (and the valve seat fitting hole) to the outer circumference of the cross section is partially different over the entire circumference. It holds. For example, in a circular shape, this length is the same (radius) all around, and it can rotate without a detent, but it functions as a detent because it cannot rotate if the lengths are partially different as described above. Further, the base portion and the valve seat fitting hole, which have a detent structure, have a shape in which the base portion and the valve seat fitting hole are fitted in only one place even if the base portion is rotated with reference to the center line (orthogonal axis L) of the base portion. This is a preferred form. Typical examples of the shape in which only one place is fitted even when rotated with reference to the center line of the base include FIG. 2 having a D-cut circle and FIG. 3 (A) having a one-point grooved circle. With this shape, for example, unlike the pentagon in FIG. 3 (B), there are no five places to fit in the direction of rotation with respect to the central axis of the valve seat member. Is fixed, so the port position and joint position will not change due to incorrect assembly.

FIG. 4 is a vertical cross-sectional view of the solenoid valve of the second embodiment when the solenoid valve is not energized (valve open state), and FIG. 5 is a cross-sectional view taken along the line AA of FIG. The solenoid valve of the second embodiment is a "concentrated closed specification" solenoid valve that is closed by energizing the electromagnetic coil 26 of the electromagnetic drive unit 2.

The difference between the second embodiment and the first embodiment is the position of the valve port 12 on the valve seat member 1B', the shape of the outer periphery of the base portion 1B1 of the valve seat member 1B', and the valve seat formed on the main body portion 1A. The shape of the fitting hole 1b is the same as that of the first embodiment. The valve port 12 in the second embodiment is located below the orthogonal axis L as a position rotated by 180 ° around the orthogonal axis L with respect to the valve port 12 in the first embodiment. As a result, when the power is not supplied as shown in FIG. 4, the valve body 4 is the opening of the valve port 12 at a predetermined position where the step portion 3a at the boundary between the valve holder portion 32 and the connecting rod 31 is in contact with the lower end of the suction element 22. Is opened, and the valve is opened. Further, when the power is turned on, the valve body 4 closes the opening of the valve port 12 on the valve seat surface 12a, and the valve is closed.

FIG. 6 is a diagram showing a modified example of the second embodiment, and the modified example 1 of FIG. 6 (A) is a ridge 1b2 formed in the valve seat fitting hole 1b as in the modified example 1 of the first embodiment. And the groove 1B1b formed in the base portion 1B1 of the valve seat member 1B'consider a detent structure that regulates the rotation of the base portion 1B1 around the orthogonal axis L. In the modified example 2 of FIG. 6B, the valve seat fitting hole 1b'and the base 1B1'are formed into a pentagonal tubular shape and a pentagonal columnar shape, as in the modified example 2 of the first embodiment. A detent structure that regulates the rotation of the base portion 1B1'around the orthogonal axis L is constructed by fitting the base portion 1B1'.

The solenoid valve of the first embodiment and the solenoid valve of the second embodiment have the same configuration of the main body 1A and the solenoid drive 2, and the valve seat member 1B and the valve seat have the same configuration with respect to the main body 1A having the same configuration. A solenoid valve of "energized open specification" and a solenoid valve of "energized closed specification" can be configured only by exchanging the member 1B'and assembling.

FIG. 7 is a vertical sectional view of the solenoid valve of the third embodiment when the solenoid valve is not energized. The solenoid valve of the third embodiment is a "energized open specification" solenoid valve. The differences between the third embodiment and the second embodiment are as follows. The electromagnetic drive unit 2'in the third embodiment includes a plunger case 21'made of a non-magnetic material, an attractor 22'made of a magnetic material fixed to the upper end of the plunger case 21', and a plunger case 21'. It includes a plunger 23'arranged so as to face the suction element 22'and a plunger spring 24'arranged between the suction element 22'and the plunger 23'. Further, a fixing sleeve 25'fixed to the inside of the lower end of the plunger case 21', an electromagnetic coil 26 arranged on the outer circumference of the plunger case 21' and having a winding wound around the bobbin 26a, and an electromagnetic coil 26 and the bobbin 26a. It is provided with an outer box 27 ′ containing the above, and a joint iron 28 ′ that secures a magnetic path from the lower part of the outer box 27 ′ to the plunger 23 ′.

The plunger case 21'is formed in a tubular shape and defines the plunger chamber 20 inside. Further, the plunger case 21'is fixed to the suction element 22'by welding or the like so as to cover the suction element 22'by a part of the side surface thereof. The suction element 22'has a mortar-shaped suction surface 22a' opening on the plunger 23' side.

The plunger 23'is composed of an appropriate magnetic material so as to be attracted by the suction element 22', and is housed in the plunger chamber 20. Further, a tapered portion 231'is provided on the side of the plunger 23'and the suction element 22'. The plunger 23'is provided so as to be movable in the axis X direction so that its outer peripheral surface is in sliding contact with the inner peripheral surface of the plunger case 21'. The plunger 23'is formed with a spring accommodating hole 23d' on the upper end side thereof and a pressure equalizing passage 23e' consisting of a vertical hole and a horizontal hole, and the plunger chamber 20 and a valve chamber are formed by the pressure equalizing passage 23e'. 10 is communicated with.

Further, in the third embodiment, the connecting portion 3'is formed integrally with the plunger 23', and has a valve holder portion 32'at the lower end portion thereof. The valve holder portion 32'has a substantially cylindrical shape and has a parallel D-cut surface 32d' facing the valve seat surface 12a. Then, as in the second embodiment, the valve holder portion 32'is formed with a valve body mounting hole 32a, a spring accommodating hole 32b, and a valve chamber communication hole 32c, and the valve spring 41 is accommodated in the valve spring accommodating hole 32b. At the same time, the valve body 4 is mounted in the valve body mounting hole 32a so as to come into contact with the valve spring 41.

With the above configuration, when the electromagnetic coil 26 is not energized, that is, when the electromagnetic coil 26 is not energized, the plunger 23'and the valve body 4 are urged downward by the spring force of the plunger spring 24'. The step portion 23a'of the plunger 23'is stopped at a predetermined position in contact with the fixing sleeve 25'. Then, at this predetermined position, the valve body 4 closes the opening of the valve port 12 on the valve seat surface 12a, and the valve is in the closed state. On the other hand, when energized, that is, when the electromagnetic coil 26 is energized, an attractive force is generated between the attractor 22'and the plunger 23', the plunger 23'and the valve body 4 rise, and the valve body 4 becomes The opening of the valve port 12 is opened, and the valve is opened. As described above, the solenoid valve of the third embodiment is a "energized open specification" solenoid valve that is opened by energization. The position of the valve body 4 in the valve closed state and the position of the valve body 4 in the valve open state are equidistant from the orthogonal axis L in the axis X direction, and the dimensions of each part are set accordingly. There is.

Also in the solenoid valve of the third embodiment, the valve seat member 1B'can be replaced with the valve seat member 1B of the first embodiment. That is, it is possible to obtain a "energized closed specification" solenoid valve with the main body 1A having the same configuration. This is similar to the mutual relationship between the first embodiment and the second embodiment.

FIG. 8 is a vertical sectional view of the solenoid valve of the fourth embodiment when the solenoid valve is not energized. The solenoid valve of the fourth embodiment is a three-way valve. The fourth embodiment differs from the first embodiment in that a second port 15 is formed in addition to the valve port 12 at the base 1B1 of the valve seat member 1B ″, and a joint member 1C is provided. The second valve port 15 of the base 1B1 is formed at a position symmetrical to the valve port 12 with respect to the orthogonal axis L, that is, below the axis X direction. The joint member 1C is a valve seat. It is attached to the member 1B ″, and the joint member 1C is formed with flow paths 16 and 17 communicating with the valve port 12 and the second port 15, respectively.

FIG. 9 is a diagram showing each embodiment of the joint member 1C corresponding to the arrow B in FIG. In the joint member 1C of the first embodiment of FIG. 9A, the flow path 16 communicating with the valve port 12 and the flow path 17 communicating with the second valve port 15 are in a direction perpendicular to the orthogonal axis L. It extends in opposite directions. In the joint member 1C of the second embodiment of FIG. 9B, the flow path 16 communicating with the valve port 12 extends in a direction perpendicular to the orthogonal axis L, and the flow path 17 communicating with the second valve port 15 Is extended in the X direction of the axis. In the joint member 1C of the third embodiment of FIG. 9C, the flow path 16 communicating with the valve port 12 extends in a direction perpendicular to the orthogonal axis L, and the flow path 17 communicating with the second valve port 15 Is extended in a direction parallel to the orthogonal axis L.

Although each embodiment has been described above, in the valve housing 1, the method of fixing the main body 1A and the valve seat member 1B (1B') and the method of fixing the valve seat member 1B ″ and the joint member 1C are welded. Screwing or the like can be applied.

Regarding the above 1st to 4th embodiments, as described above and as shown in FIGS. 1, 4, 7, and 8, the main body 1A has a pipe portion 1A1 protruding downward. However, the present invention is not limited to the pipe portion protruding downward, and may be a pipe portion protruding in the lateral portion or in another direction.

In addition, in FIGS. 9A, 9B, and 9C, three patterns of examples of the joint member are given, but it is not limited to the joint direction in this figure, and what if the two joints do not interfere with each other. The pattern joint may be used. For example, each joint is drawn in the horizontal direction and the vertical direction, but is not limited to horizontal and vertical directions, and may have an angle such as 45 °.

The first to fourth embodiments and modifications thereof have been described based on the above explanations and the drawings, but the shapes of the valve seat fitting hole and the base portion are not limited to the above description. Any shape may be used as long as it functions as a detent for the valve seat member. For example, the cross-sectional shape parallel to the valve seat surface of the base corresponds to any shape other than a circle, such as a polygon such as a triangle or a square, an ellipse, a trapezoid, a star, or a groove in a part of a circle.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention.

1 Valve housing 1A Main body 1B Valve seat member 10 Valve chamber 11 Primary side port 1b Valve seat fitting hole 1B1 Base 1B2 Pipe 1B3 Flange 12a Valve seat surface 12 Valve port L Orthogonal axis X Axis line 2 Electromagnetic drive unit 21 Plunger case 22 Aspirator 23 Flange 24 Plunger spring 25 Fixing sleeve 26 Electromagnetic coil 27 Outer box 28 Joint iron 3 Connecting part 31 Connecting rod 32 Valve holder part 32a Valve body mounting hole 32b Valve spring accommodating hole 32c Communication hole 4 Valve body 4a Sealing surface 41 Valve spring 1B ′ Valve seat member 2 ′ Electromagnetic drive part 21 ′ Plunger case 22 ′ Aspirator 23 ′ Plunger 24 ′ Plunger spring 25 ′ Fixing sleeve 27 ′ Outer box 28 ′ Joint iron 3 ′ Connecting portion 32 ′ Valve holder portion 1B ″ Valve seat member 1C Joint member 15 Second port 16 Flow path 17 Flow path

Claims (7)

In a solenoid valve provided with a valve housing in which a valve chamber for accommodating the valve body is formed and an electromagnetic drive unit for moving the valve body in the axial direction.
The valve housing has a main body portion in which the valve chamber and a primary side port for introducing a fluid communicating with the valve chamber are formed, and the valve housing is assembled to the main body portion and is parallel to the axis on the valve chamber side. It is composed of a valve seat member that arranges a valve seat surface and opens a valve port from the valve seat surface to the valve chamber, and the valve body slides on the valve seat surface in the axial direction. The valve body is configured to open and close the valve port.
The base portion of the valve seat member to be assembled to the main body portion is fitted into the valve seat fitting hole aligned with the base portion of the main body portion.
The base portion and the valve seat fitting hole have a detent structure for fixing the position of the base portion in the axial direction and restricting rotation around an orthogonal axis orthogonal to the axial line, and the valve. A solenoid valve characterized in that openings in the valve seat surface of the port are unevenly distributed in the axial direction with respect to the orthogonal axis. The solenoid valve according to claim 1, wherein the cross section parallel to the valve seat surface of the base portion has a shape in which the length from the orthogonal axis to the outer circumference is partially different. The solenoid according to claim 2, wherein the base portion and the valve seat fitting hole fit into the valve seat fitting hole at only one place even if the base portion is rotated with reference to the orthogonal axis. valve. The solenoid valve according to claim 3, wherein the valve body opens the valve port at a position where the plunger is attracted to the attractor side by energization by the solenoid drive unit. The solenoid valve according to claim 3, wherein the valve body closes the valve port at a position where the plunger is attracted to the attractor side by energization by the solenoid drive unit. The solenoid valve according to claim 4 or 5, wherein a second port is formed on the valve seat member at a position symmetrical to the valve port with respect to the orthogonal axis. The solenoid valve according to claim 6, further comprising a joint member attached to the valve seat member and formed with a flow path communicating with the valve port and the second port, respectively.

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